文献类型：期刊文献

中文题名：Effects of phosphorus resorption on bioactive phosphorus of different-aged Pinus massoniana plantations

作者：Xupeng Xue[1,2] Xiaogai Ge[1,2,3] Lei Lei[4] Benzhi Zhou[1,2] Mai-He Li[3,5,6]

第一作者：Xupeng Xue

机构：[1]Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou,311400,China;[2]Qianjiangyuan Forest Ecosystem Research Station,National Forestry and Grassland Administration,Hangzhou,311400,China;[3]Swiss Federal Institute for Forest,Snow and Landscape Research WSL,Zuercherstrasse 111,CH-8903,Birmensdorf,Switzerland;[4]Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing,100091,China;[5]Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains,Ministry of Education/School of Geographical Sciences,Northeast Normal University,Changchun,130024,China;[6]College of Life Science,Hebei University,Baoding,071000,China

年份：2024

卷号：11

期号：6

起止页码：875-885

中文期刊名：Forest Ecosystems

外文期刊名：森林生态系统(英文版)

收录：CSCD:【CSCD2023_2024】；

基金：supported by the Fundamental Research Funds for the Central Non-profit Research Institution(CAFYBB2021QD002-2 and CAFYBB2020ZE001);the National Key Research and Development Program of China(2023YFD2200404-02);the Qianjiangyuan National Forest Ecological Research Station.

语种：英文

中文关键词：Organ phosphorus components;Phosphorus cycling;Phosphorus resorption;Stand age

分类号：S71

摘要：Phosphorus(P)is an important nutrient element in the photosynthesis process of plants.The effect of stand age on P nutrient dynamics in subtropical plantations is unclear.In this study,the mechanisms of above-and belowground P cycling in subtropical P.massoniana plantations of different stand ages(5,9,19,29 and 35 years)were investigated.The percentage of metabolic P in leaves exhibited an initial rise and subsequent decline with stand age of P.massoniana throughout the growing season,culminating in a metabolic P proportion of 34%–68% in litter.During the non-growing season,the main change in the P components of P.massoniana fine roots was a transition from metabolic P to residual P.Relative to during the growing season,soil ligand P fractions decreased by 7%–22% and exchangeable P fractions increased by 0–16%in the non-growing season.Organ P components tended to decrease with increasing stand age,mainly due to the gradual decrease in soil-bioavailable P,a trend alleviated by litter input.The generation of dissolved P by soil phosphatases would limit the reduction in soilbioavailable P caused by leaf P resorption to some extent.The differences in leaf organ P components between the growing and non-growing seasons are attributed to the allocation of P by the P.massoniana.Overall,the results of this study provide a basis for exploring the mechanisms of soil bioavailable P and soil P enzymemediated organ P component allocation in P.massoniana forests.These findings will help improve the management of P-limited P.massoniana plantations to enhance their productivity.